[BUG] Register credentials allow extraneous input

[patrickdx]

In the "Register Here" tab, there are no restrictions (apart from being empty) on what could possibly be entered in these fields. The email field does not require the proper email suffix e.g. @mail.com to be present.

• Furthermore, potential credientals could simply consist of whitespace.

I suggest using some regular expressions for specifying the format for these fields.

[Ammadq87]

Solution: Add REGEX for email, restrict whitespace